> Accuracy (how precise the data is). Everything should be accurate.

Accurate and precise are different things.

You can be precise: We averaged 1 sale per hour today +- 0.01

You can be accurate: We sold 8 things today

You can be precise but innaccurate: We averaged 100 sales per hour today +- 0.01

You can be imprecise and accurate: We sold 8 items today +- 10

And you can be both: We sold 8 items today +- 0.01

And you can be neither: We sold 100 items today +- 10